Carbon Microstructure Dependent Li‐Ion Storage Behaviors in SiO<sub>x</sub>/C Anodes

Sun, Qing; Li, Jing; Yang, Maoxiang; Wang, Shang; Zeng, Guifang; Liu, Hongbin; Cheng, Jun; Li, Deping; Wei, Youri; Si, Pengchao; Tian, Yanhong; Ci, Lijie

doi:10.1002/smll.202300759

Cited by 37 publications

(23 citation statements)

References 35 publications

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“…The results demonstrate that the former presents a carbon layer with a higher level of structural disorder, which is more beneficial for the diffusion of lithium ions. 40 The carbon content of SiO@C and SiO−SiO 2 @C can be roughly determined to be 8.53 and 14.61 wt % from the TGA results depicted in Figure 2c, respectively. Particularly, the C content in SiO−SiO 2 @C is nearly twice that in SiO@C, producing significantly higher conductivity in the former.…”

Section: Resultsmentioning

confidence: 93%

Amorphous SiO₂ Nanoparticles Encapsulating a SiO Anode with Strong Structure for High-Rate Lithium-Ion Batteries

Hu,

Xu,

Liao

et al. 2024

ACS Appl. Energy Mater.

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Constructing a robust structure is crucial for addressing the inherent flaws of SiO-based anode materials, such as significant volume expansion and high ion and electron resistance. Therefore, in this article, we synthesized a SiO-based composite denoted as SiO−SiO 2 @C via a facile liquid-phase method. This composite possessed a sturdy three-dimensional structure and dual functionality. The superstructure was formed by the carbon-coated amorphous SiO 2 nanoparticles surrounding the SiO particles, which endowed the structural stability of SiO−SiO 2 @C. It is worth noting that the SiO−SiO 2 @C composite manifested a high ICE of 75.7% and an impressive reversible capacity of 1061.0 mA h g −1 at 0.2 A g −1 after 100 cycles, with a 97% capacity retention compared to the second discharge. Furthermore, this electrode showed exceptional cycle performance of 430.5 mA h g −1 after 700 cycles at 2 A g −1 and rate performance with an average reversible capacity of 703.4 mA h g −1 at 3 A g −1 . Overall, the prepared SiO−SiO 2 @C electrode material displayed a huge opportunity for lithium-ion battery anodes.

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Section: Resultsmentioning

confidence: 93%

Amorphous SiO₂ Nanoparticles Encapsulating a SiO Anode with Strong Structure for High-Rate Lithium-Ion Batteries

Hu,

Xu,

Liao

et al. 2024

ACS Appl. Energy Mater.

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“…Bi 2 Te 3 exhibits a typical type III adsorption/desorption isotherm, [ 34 ] with moderate N 2 adsorption at low relative pressures associated with a low density of micropores. [ 35 ] In contrast, Bi 2 Te 3 @PPy displays a type IV isotherm with an obvious knee‐like flexure ascribed to micropores in the PPy shell. [ 36–39 ] As calculated by the Brunauer–Emmett–Teller method, Bi 2 Te 3 @PPy presents a higher specific surface area, 14.58 m 2 g −1 , than Bi 2 Te 3 , 6.02 m 2 g −1 , associated with the presence of micropores in the former.…”

Section: Resultsmentioning

confidence: 99%

A Layered Bi₂Te₃@PPy Cathode for Aqueous Zinc‐Ion Batteries: Mechanism and Application in Printed Flexible Batteries

et al. 2023

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Low‐cost, safe, and environmental‐friendly rechargeable aqueous zinc‐ion batteries (ZIBs) are promising as next‐generation energy storage devices for wearable electronics among other applications. However, sluggish ionic transport kinetics and the unstable electrode structure during ionic insertion/extraction hampers their deployment. Herein, we propose a new cathode material based on a layered metal chalcogenide (LMC), bismuth telluride (Bi2Te3), coated with polypyrrole (PPy). Taking advantage of the PPy coating, the Bi2Te3@PPy composite presents strong ionic absorption affinity, high oxidation resistance, and high structural stability. The ZIBs based on Bi2Te3@PPy cathodes exhibit high capacities and ultra‐long lifespans of over 5000 cycles. They also present outstanding stability even under bending. In addition, we analyze here the reaction mechanism using in situ X‐ray diffraction, X‐ray photoelectron spectroscopy, and computational tools and demonstrate that, in the aqueous system, Zn2+ is not inserted into the cathode as previously assumed. In contrast, proton charge storage dominates the process. Overall, this work not only shows the great potential of LMCs as ZIBs cathode materials and the advantages of PPy coating, but also clarifies the charge/discharge mechanism in rechargeable ZIBs based on LMCs.This article is protected by copyright. All rights reserved

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“…However, SiO 0.71 C 1.95 N 0.47 exhibits a distinct interface between the internal reticular Si–O framework and the external carbon cladding layer (Figure a). Furthermore, a rough amorphous carbon layer with no evident lattice fringes is observed in Figure b, indicating that the carbon layer serves as the wrapping structure . Carbonaceous matrices can effectively release mechanical stress of silicon particles and alleviate volume variation during charge/discharge cycles .…”

Section: Methodsmentioning

confidence: 97%

“…Furthermore, a rough amorphous carbon layer with no evident lattice fringes is observed in Figure 3b, indicating that the carbon layer serves as the wrapping structure. 15 Carbonaceous matrices can effectively release mechanical stress of silicon particles and alleviate volume variation during charge/discharge cycles. 16 Energy-dispersive spectrometry (EDS) element mapping correlated to the TEM image of SiO 0.71 C 1.95 N 0.47 confirms the uniform distribution of C, Si, O, and N. Additionally, the mass fractions of each element tested by EDS are consistent with the results obtained through inductively coupled plasma (ICP) technology and an element analyzer (EA), as listed in Table S1 of the Supporting Information.…”

Section: Methodsmentioning

confidence: 99%

Analysis of the Lithium Storage Mechanism in the SiO_x/C Composite Based on the Performance Variation Applied to a Lithium-Ion Battery

Zhang

Fan²,

Tan

et al. 2023

Energy Fuels

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The SiO x /C composite, as a form of silicon-based materials, has been considered as an attractive alternative anode for next-generation lithium-ion batteries. The porous SiO 0.71 C 1.95 N 0.47 anode material exhibiting robust Si−O skeletons wrapped by carbon layers is successfully prepared and delivers an initial capacity of over 1700 mAh g −1 with an initial coulombic efficiency of 69.4% and favorable cycle life. Both Si (2p) X-ray photoelectron spectroscopy (XPS) and 29 Si nuclear magnetic resonance (NMR) demonstrate the existence of SiO 4 and SiO 3 C units as main lithium storage sites in the original state. The XPS curve moved toward the direction of the binding energy decreasing with NMR spectra shifting to a high field after the first lithiation process. The massive capacity loss during the first discharge and charge cycle results from the formation of irreversible Li silicate (Li 2 SiO 4 ). The fluctuation of the charge and discharge capacity, including a persistent decline during the first 30 cycles and a continuous elevation in the following 400 cycles, could be attributed to the participated degree of reversible Li silicate (Li 2 SiO 3 and Li 2 Si 2 O 5 ) in the delithiation process. The Si−O skeletons are gradually corroded and ultimately destroyed in the final 400 cycles, leading to the sharp drop of the cycling performance of the half-cell.

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Carbon Microstructure Dependent Li‐Ion Storage Behaviors in SiO_x/C Anodes

Cited by 37 publications

References 35 publications

Amorphous SiO₂ Nanoparticles Encapsulating a SiO Anode with Strong Structure for High-Rate Lithium-Ion Batteries

Amorphous SiO₂ Nanoparticles Encapsulating a SiO Anode with Strong Structure for High-Rate Lithium-Ion Batteries

A Layered Bi₂Te₃@PPy Cathode for Aqueous Zinc‐Ion Batteries: Mechanism and Application in Printed Flexible Batteries

Analysis of the Lithium Storage Mechanism in the SiO_x/C Composite Based on the Performance Variation Applied to a Lithium-Ion Battery

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Carbon Microstructure Dependent Li‐Ion Storage Behaviors in SiOx/C Anodes

Cited by 37 publications

References 35 publications

Amorphous SiO2 Nanoparticles Encapsulating a SiO Anode with Strong Structure for High-Rate Lithium-Ion Batteries

Amorphous SiO2 Nanoparticles Encapsulating a SiO Anode with Strong Structure for High-Rate Lithium-Ion Batteries

A Layered Bi2Te3@PPy Cathode for Aqueous Zinc‐Ion Batteries: Mechanism and Application in Printed Flexible Batteries

Analysis of the Lithium Storage Mechanism in the SiOx/C Composite Based on the Performance Variation Applied to a Lithium-Ion Battery

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Product

Resources

About

Carbon Microstructure Dependent Li‐Ion Storage Behaviors in SiO_x/C Anodes

Amorphous SiO₂ Nanoparticles Encapsulating a SiO Anode with Strong Structure for High-Rate Lithium-Ion Batteries

Amorphous SiO₂ Nanoparticles Encapsulating a SiO Anode with Strong Structure for High-Rate Lithium-Ion Batteries

A Layered Bi₂Te₃@PPy Cathode for Aqueous Zinc‐Ion Batteries: Mechanism and Application in Printed Flexible Batteries

Analysis of the Lithium Storage Mechanism in the SiO_x/C Composite Based on the Performance Variation Applied to a Lithium-Ion Battery